WO2004059161A1 - Sliding valve - Google Patents

Sliding valve Download PDF

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Publication number
WO2004059161A1
WO2004059161A1 PCT/EP2003/012936 EP0312936W WO2004059161A1 WO 2004059161 A1 WO2004059161 A1 WO 2004059161A1 EP 0312936 W EP0312936 W EP 0312936W WO 2004059161 A1 WO2004059161 A1 WO 2004059161A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
valve according
sliding sleeve
control cylinder
slide valve
Prior art date
Application number
PCT/EP2003/012936
Other languages
German (de)
French (fr)
Inventor
Gernot Hertweck
Holger KÖGL
Katsuyoshi Koyanagi
Heinrich Müller
Heinz Öing
Gregor Renner
Marco Stotz
Jens-Peter Wobbe
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to JP2004562553A priority Critical patent/JP4232041B2/en
Priority to EP03776910A priority patent/EP1576281B1/en
Priority to US10/540,290 priority patent/US20060124763A1/en
Priority to DE50303752T priority patent/DE50303752D1/en
Publication of WO2004059161A1 publication Critical patent/WO2004059161A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a slide valve according to the preamble of claim 1.
  • a reciprocating internal combustion engine with a fuel injection nozzle is known.
  • This has a hollow valve needle with a valve needle head pointing towards a combustion chamber of the internal combustion engine.
  • Nozzle bores are provided between the cavity of the valve needle and its outer circumference, through which the fuel is injected into the combustion chamber when the injection valve is open.
  • the injection valve opens in that the valve needle is displaced outwards towards the combustion chamber, a valve seat surface on the needle head lifting off from a valve seat on a nozzle body.
  • the instantaneous opening cross section of the nozzle holes is determined as a function of the needle stroke by a control edge on the inner edge of the valve seat of the nozzle body.
  • the injection valve has two rows of controllable nozzle holes which are offset from one another in the direction of movement of the valve needle.
  • the nozzle holes in one row differ from the nozzle holes in the other row in their inclination to the nozzle axis and in their cross-sectional shape, so that the mixture formation in the combustion chamber can be adapted to the operating parameters over a wide range.
  • the fuel injection valve is a combination of a poppet valve, which prevents the injection nozzle from dripping when closed, and a slide valve, which varies the injection quantity and fuel preparation can. Because of the nozzle holes in the valve needle, the walls of the valve needles must be of sufficient thickness.
  • valve needle head increases the mass of the valve, so that in addition to the complexity of the injection nozzle, the combination of two control mechanisms means that the needle control and actuation is very complex because of the mass of the nozzle needle and can lead to switching noises. In addition, such a system is not possible for injectors with nozzle needles opening inwards.
  • an inwardly opening injection nozzle is also known with two rows of nozzle bores, which are made in the nozzle body and are opened and closed by two coaxial nozzle needles with corresponding end faces.
  • the invention is based on the object of simplifying a tightly closing slide valve and reducing the mass of the moving part. It is solved according to the invention by the features of claim 1. Further advantageous embodiments result from the subclaims.
  • the control surface on the sliding sleeve towards the control cylinder is radially elastically flexible. As a result, it can tightly close the control openings in the closed state without high manufacturing expenditure for tight fits. It is advantageous here that the control surfaces bear against the control cylinder under a predetermined pretension or are pressed against the control cylinder by the pressure of a controlled medium, a gas or a liquid. Since the contact pressure increases with increasing medium pressure, the slide valve seals reliably even at high media pressures.
  • the medium namely the fuel is supplied under high pressure through the cavity of the valve needle or the sliding sleeve
  • the slide valve according to the invention is characterized above all by a simple structure, freedom from leakage and a low mass of the moving parts, as a result of which the effort for the control and actuator system is reduced with short response times. Switching noises are also avoided.
  • the elasticity in the radial direction can be generated in that the thin-walled sliding sleeve in the area of the control surfaces is designed like a membrane or in that the control surface is arranged on resilient parts of the sliding sleeve.
  • the sliding sleeve has at least one longitudinal slot, so that the control surface can yield radially. If a plurality of control surfaces are assigned to a plurality of control openings distributed over the circumference, a corresponding number of longitudinal slots are provided which form spring tongues between them, on which the control surfaces are arranged. If the longitudinal slots are made up to the end face of the sliding sleeve, it is advantageous to arrange the control surfaces at the end of the spring tongues thus formed.
  • the spring tongue's geometric design can influence its spring characteristics and adapt it to the application.
  • the spring tongues are expediently reinforced in the area of the control surfaces. This gives the control surfaces sufficient dimensional stability so that they can lie close to the control openings.
  • the sliding sleeve can be made of magnetically conductive material and its upper part can simultaneously serve as an armature of a magnetic circuit.
  • the control surfaces of the sliding sleeve are clearly assigned to the control openings, it is expedient to secure the sliding sleeve against rotation during its axial movement or to guide it in the rotational movement. This can happen, for example, in that the sliding sleeve or a part connected to it has a cross-sectional profile that deviates from the circular shape and is guided in a suitable guide of the valve body. Such a profile could be a polygonal profile, for example. Furthermore, the sliding sleeve could be guided in a steep thread.
  • Fig. 1 shows a schematic longitudinal section through a slide valve according to the invention
  • Fig. 2 is an enlarged perspective view of a
  • a slide valve 10 in the form of a fuel injection valve for an internal combustion engine has a valve housing 11, in which a sliding sleeve 12 is guided axially displaceably in the direction of movement 29 in a control cylinder 13.
  • the sliding sleeve 12 is connected to a valve rod 14 by a cross pin 15, which is inserted in a transverse bore 16 of the sliding sleeve 12. This is actuated by an actuator system, not shown, for example by an electromagnet. confirmed.
  • the sliding sleeve 12 and its upper part 27 can be made of magnetic material and designed as a magnet armature.
  • the sliding sleeve 12 has longitudinal slots 24, which are distributed over the circumference and form spring tongues 25 between them, at the ends of which control surfaces 23 are arranged on the outer circumference, which interact with control openings 17, 18 in the control cylinder 13.
  • Outwardly directed nozzle bores 19, 20 adjoin the control openings 17, 18. These are arranged offset to one another in the direction of movement 29 of the sliding sleeve 12.
  • the control surfaces 23 cover the control openings 17, 18.
  • a control surface 23 can cooperate with one or more control openings 17, 18.
  • the corresponding control opening 17 or 18 is first released and, when the sliding sleeve 12 is adjusted further, the control opening 17 or 18 which has remained closed until now.
  • the sliding sleeve 12 can thus alternately or successively more control openings 17 or 18 more o - the less tax.
  • the spring tongues 25 are reinforced, so that the control surfaces 23 bear tightly against the control openings 17, 18 due to the increased dimensional stability and seal them off without leakage.
  • the pressure with which the control surfaces 23 bear against the control openings 17, 18 can be achieved by a specific pretensioning of the spring tongues 25 or by the pressure of the medium to be controlled. This is fed centrally through a cavity 22 of the sliding sleeve 12 and conveyed through the nozzle bores 19, 20.
  • the control cylinder 13 closes at the end with the blind hole 21.
  • the spring tongues 25 are expediently pre-bent outwards by a predetermined amount. Furthermore, the spring characteristic can be determined by the choice of material and the geometric design.
  • the valve housing 11 Around the sliding sleeve well To be able to mount, the valve housing 11 has a conical area 28 towards the control cylinder 13, through which the spring tongues 25 are pressed back to the size of the control cylinder 13.
  • FIG. 2 which essentially represents a section of FIG. 1 on an enlarged scale, shows two rows of nozzle bores 19, 20 which are arranged offset to one another in the direction of movement 29 and / or in the circumferential direction.
  • the nozzle bores 19, 20 can have a different inclination to the direction of movement 29 and also have different cross-sectional profiles, as is known per se in fuel injection valves of the type mentioned at the outset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a sliding valve (10) comprising a sliding sleeve (12) that can be axially slid in a control cylinder (13). With at least one control surface (23) on its outer circumference, the sliding sleeve controls at least one control opening (17, 18) in the control cylinder (13). The inventive sliding valve is characterized in that the control surface (23) is radially elastic towards the control cylinder (13).

Description

Schieberventil spool valve
Die Erfindung betrifft ein Schieberventil nach dem Oberbegriff des Anspruchs 1.The invention relates to a slide valve according to the preamble of claim 1.
Aus der DE 199 16 485 C2 ist eine Hubkolbenbrennkraftmaschine mit einer Kraftstoffeinspritzdüse bekannt. Diese besitzt eine hohle Ventilnadel mit einem zu einem Brennraum der Brennkraftmaschine hin weisenden Ventilnadelkopf . Zwischen dem Hohlraum der Ventilnadel und ihrem äußeren Umfang sind Düsenbohrungen vorgesehen, durch die der Kraftstoff im geöffneten Zustand des Einspritzventils in den Brennraum gespritzt wird. Das Einspritzventil öffnet, indem die Ventilnadel nach außen zum Brennraum hin verschoben wird, wobei eine Ventilsitzfläche am Nadelkopf von einem Ventilsitz an einem Düsenkörper abhebt. Der momentane Öffnungsquerschnitt der Düsenlöcher wird in Abhängigkeit vom Nadelhub von einer Steuerkante am inneren Rand des Ventilsitzes des Düsenkörpers bestimmt.From DE 199 16 485 C2 a reciprocating internal combustion engine with a fuel injection nozzle is known. This has a hollow valve needle with a valve needle head pointing towards a combustion chamber of the internal combustion engine. Nozzle bores are provided between the cavity of the valve needle and its outer circumference, through which the fuel is injected into the combustion chamber when the injection valve is open. The injection valve opens in that the valve needle is displaced outwards towards the combustion chamber, a valve seat surface on the needle head lifting off from a valve seat on a nozzle body. The instantaneous opening cross section of the nozzle holes is determined as a function of the needle stroke by a control edge on the inner edge of the valve seat of the nozzle body.
Das Einspritzventil besitzt zwei Reihen von steuerbaren Düsenlöchern, die in Bewegungsrichtung der Ventilnadel zueinander versetzt angeordnet sind. Die Düsenlδcher der einen Reihe unterscheiden sich von den Düsenlδchern der anderen Reihe in ihrer Neigung zur Düsenachse und in ihrer Querschnittform, so dass die Gemischbildung im Brennraum in weiten Bereichen an die Betriebsparameter angepasst werden kann. Das Kraftstoff- einspritzventil ist eine Kombination aus einem Sitzventil, wodurch im geschlossenen Zustand ein Nachtropfen der Einspritzdüse verhindert wird und einem Schieberventil, wodurch die Einspritzmenge und Kraftstoffaufbereitung variiert werden kann. Wegen der Düsenbohrungen in der Ventilnadel müssen die Wände der Ventilnadeln eine ausreichende Stärke besitzen. Ferner erhöht der Ventilnadelkopf die Masse des Ventils, so dass neben der Komplexität der Einspritzdüse durch die Kombination zweier Steuermechanismen die Nadelansteuerung und Ak- tuatorik wegen der Masse der Düsennadel sehr aufwändig ist und zu Schaltgeräuschen führen kann. Außerdem ist ein solches System nicht für Einspritzdüsen mit nach innen öffnenden Düsennadeln möglich.The injection valve has two rows of controllable nozzle holes which are offset from one another in the direction of movement of the valve needle. The nozzle holes in one row differ from the nozzle holes in the other row in their inclination to the nozzle axis and in their cross-sectional shape, so that the mixture formation in the combustion chamber can be adapted to the operating parameters over a wide range. The fuel injection valve is a combination of a poppet valve, which prevents the injection nozzle from dripping when closed, and a slide valve, which varies the injection quantity and fuel preparation can. Because of the nozzle holes in the valve needle, the walls of the valve needles must be of sufficient thickness. Furthermore, the valve needle head increases the mass of the valve, so that in addition to the complexity of the injection nozzle, the combination of two control mechanisms means that the needle control and actuation is very complex because of the mass of the nozzle needle and can lead to switching noises. In addition, such a system is not possible for injectors with nozzle needles opening inwards.
Aus der DE 100 10 863 AI ist eine nach innen öffnende Einspritzdüse bekannt mit ebenfalls zwei Reihen von Düsenbohrungen, die in den Düsenkörper eingebracht sind und von zwei koaxial zueinander angeordneten Düsennadeln mit entsprechenden stirnseitigen Sitzflächen geöffnet und verschlossen werden.From DE 100 10 863 AI an inwardly opening injection nozzle is also known with two rows of nozzle bores, which are made in the nozzle body and are opened and closed by two coaxial nozzle needles with corresponding end faces.
Der Erfindung liegt die Aufgabe zu Grunde, ein dicht schließendes Schieberventil zu vereinfachen und die Masse der bewegten Teil zu verringern. Sie wird gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst . Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The invention is based on the object of simplifying a tightly closing slide valve and reducing the mass of the moving part. It is solved according to the invention by the features of claim 1. Further advantageous embodiments result from the subclaims.
Nach der Erfindung ist die Steuerfläche an der Schiebehülse zum Steuerzylinder hin radial elastisch nachgiebig. Dadurch kann sie ohne hohen Fertigungsaufwand für enge Passungen die Steueröffnungen im geschlossenen Zustand dicht abschließen. Hierbei ist es vorteilhaft, dass die Steuerflächen unter einer vorbestimmten Vorspannung am Steuerzylinder anliegen oder durch den Druck eines gesteuerten Mediums, eines Gases oder einer Flüssigkeit, gegen den Steuerzylinder gedrückt werden. Da der Anpressdruck mit steigendem Mediumdruck größer wird, dichtet das Schieberventil auch bei hohen Mediendrücken sicher ab.According to the invention, the control surface on the sliding sleeve towards the control cylinder is radially elastically flexible. As a result, it can tightly close the control openings in the closed state without high manufacturing expenditure for tight fits. It is advantageous here that the control surfaces bear against the control cylinder under a predetermined pretension or are pressed against the control cylinder by the pressure of a controlled medium, a gas or a liquid. Since the contact pressure increases with increasing medium pressure, the slide valve seals reliably even at high media pressures.
Da bei einem Kraftstoffeinspritzventil das Medium, nämlich der Kraftstoff unter hohem Druck durch den Hohlraum der Ventilnadel bzw. der Schiebehülse zugeführt wird, eignet sich ein solches Schieberventil insbesondere als Kraftstoffein- spritzventil ; jedoch ist es gleichermaßen für andere Anwendungsfälle und zum Steuern von gasförmigen Medien geeignet . Das erfindungsgemäße Schieberventil zeichnet sich vor allem durch einen einfachen Aufbau, Leckagefreiheit und einer geringen Masse der bewegten Teile aus, wodurch sich der Aufwand für die Steuerung und Aktuatorik bei kurzen Ansprechzeiten verringert. Ferner werden Schaltgeräusche vermieden.Since in a fuel injection valve the medium, namely the fuel is supplied under high pressure through the cavity of the valve needle or the sliding sleeve, is suitable such a slide valve in particular as a fuel injection valve; however, it is equally suitable for other applications and for controlling gaseous media. The slide valve according to the invention is characterized above all by a simple structure, freedom from leakage and a low mass of the moving parts, as a result of which the effort for the control and actuator system is reduced with short response times. Switching noises are also avoided.
Die Elastizität in radialer Richtung kann dadurch erzeugt werden, dass die dünnwandige Schiebehülse im Bereich der Steuerflächen membranartig ausgeführt ist oder dass die Steuerfläche an federnd nachgiebigen Teilen der Schiebehülse angeordnet ist. Nach einer Ausgestaltung der Erfindung weist die Schiebehülse mindestens einen Längsschlitz auf, so dass die Steuerfläche radial nachgeben kann. Sind mehrere Steuerflächen über den Umfang verteilt mehreren Steueröffnungen zugeordnet, werden entsprechend viele Längsschlitze vorgesehen, die zwischen sich Federzungen bilden, an denen die Steuerflächen angeordnet sind. Wenn die Längsschlitze bis zur Stirnseite der Schiebehülse durchgeführt sind, ist es vorteilhaft, die Steuerflächen am Ende der so gebildeten Federzungen anzuordnen. Durch die geometrische Gestaltung der Federzungen kann deren Federcharakteristik beeinflusst und auf den Einsatzfall abgestimmt werden.The elasticity in the radial direction can be generated in that the thin-walled sliding sleeve in the area of the control surfaces is designed like a membrane or in that the control surface is arranged on resilient parts of the sliding sleeve. According to one embodiment of the invention, the sliding sleeve has at least one longitudinal slot, so that the control surface can yield radially. If a plurality of control surfaces are assigned to a plurality of control openings distributed over the circumference, a corresponding number of longitudinal slots are provided which form spring tongues between them, on which the control surfaces are arranged. If the longitudinal slots are made up to the end face of the sliding sleeve, it is advantageous to arrange the control surfaces at the end of the spring tongues thus formed. The spring tongue's geometric design can influence its spring characteristics and adapt it to the application.
Zweckmäßigerweise werden die Federzungen im Bereich der Steuerflächen verstärkt. Dadurch erhalten die Steuerflächen eine ausreichende Formstabilität, so dass sie sich dicht an die Steuerδffnungen anlegen können.The spring tongues are expediently reinforced in the area of the control surfaces. This gives the control surfaces sufficient dimensional stability so that they can lie close to the control openings.
Um die Montage des Schieberventils zu vereinfachen, wird es zweckmäßigerweise in einer Cartridge-Bauweise ausgeführt. Ferner kann die Schiebehülse aus magnetisch leitendem Material hergestellt sein und ihr oberer Teil gleichzeitig als Anker eines Magnetkreises dienen. Dadurch erreicht man eine vereinfachte, kompakt bauende Aktuatorik. Damit die Steuerflächen der Schiebehülse den Steueröffnungen eindeutig zugeordnet sind, ist es zweckmäßig, die Schiebehülse während ihrer Axialbewegung gegen Verdrehen zu sichern o- der in der Drehbewegung zwangsweise zu führen. Dies kann z.B. dadurch geschehen, dass die Schiebehülse oder ein mit ihr verbundenes Teil ein von der Kreisform abweichendes Querschnittprofil aufweist, das in einer passenden Führung des Ventilkörpers geführt ist. Ein solches Profil könnte z.B. ein Vielkantprofil sein. Ferner könnte die Schiebehülse in einem Steilgewinde geführt sein.In order to simplify the assembly of the slide valve, it is expediently carried out in a cartridge design. Furthermore, the sliding sleeve can be made of magnetically conductive material and its upper part can simultaneously serve as an armature of a magnetic circuit. This results in a simplified, compact actuator system. So that the control surfaces of the sliding sleeve are clearly assigned to the control openings, it is expedient to secure the sliding sleeve against rotation during its axial movement or to guide it in the rotational movement. This can happen, for example, in that the sliding sleeve or a part connected to it has a cross-sectional profile that deviates from the circular shape and is guided in a suitable guide of the valve body. Such a profile could be a polygonal profile, for example. Furthermore, the sliding sleeve could be guided in a steep thread.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages result from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.
Dabei zeigen:Show:
Fig. 1 einen schematischen Längsschnitt durch ein erfindungsgemäßes Schieberventil undFig. 1 shows a schematic longitudinal section through a slide valve according to the invention and
Fig. 2 eine perspektivische Ausschnittsvergrößerung einerFig. 2 is an enlarged perspective view of a
Variante nach Fig. 1 mit zwei Reihen Düsenbohrungen.1 with two rows of nozzle bores.
Ein Schieberventil 10 in Form eines Kraftstoffeinspritzven- tils für eine Brennkraftmaschine besitzt ein Ventilgehäuse 11, in dem eine Schiebehülse 12 in einem Steuerzylinder 13 a- xial in Bewegungsrichtung 29 verschiebbar geführt ist. Die Schiebehülse 12 ist durch einen Querstift 15, der in einer Querbohrung 16 der Schiebehülse 12 eingesetzt ist, mit einer Ventilstange 14 verbunden. Diese wird von einer nicht näher dargestellten Aktuatorik, z.B. von einem Elektromagneten, be- tätigt. Dabei können die Schiebehülse 12 und ihr oberer Teil 27 aus magnetischem Werkstoff hergestellt werden und als Magnetanker ausgebildet sein.A slide valve 10 in the form of a fuel injection valve for an internal combustion engine has a valve housing 11, in which a sliding sleeve 12 is guided axially displaceably in the direction of movement 29 in a control cylinder 13. The sliding sleeve 12 is connected to a valve rod 14 by a cross pin 15, which is inserted in a transverse bore 16 of the sliding sleeve 12. This is actuated by an actuator system, not shown, for example by an electromagnet. confirmed. The sliding sleeve 12 and its upper part 27 can be made of magnetic material and designed as a magnet armature.
Die Schiebehülse 12 weist von ihrem freien Ende ausgehend Längsschlitze 24 auf, die über den Umfang verteilt sind und zwischen sich Federzungen 25 bilden, an deren Enden am äußeren Umfang Steuerflächen 23 angeordnet sind, die mit Steuer- Öffnungen 17, 18 im Steuerzylinder 13 zusammenwirken. An die Steueröffnungen 17, 18 schließen sich nach außen gerichtete Düsenbohrungen 19, 20 an. Diese sind in Bewegungsrichtung 29 der Schiebehülse 12 versetzt zueinander angeordnet. Im geschlossenen Zustand des Schieberventils 10 überdecken die Steuerflächen 23 die Steueröffnungen 17, 18. Dabei kann eine Steuerfläche 23 mit einer oder mehreren Steueröffnungen 17, 18 zusammenwirken. Durch die Bewegung der Schiebehülse 12 in eine Richtung, wird zunächst die entsprechende Steueröffnung 17 oder 18 freigegeben und bei einem weiteren Verstellen Schiebehülse 12 die bisher verschlossen gebliebene Steueröffnung 17 oder 18. Somit kann die Schiebehülse 12 mehrere Steueröffnungen 17 oder 18 wechselweise oder nacheinander mehr o- der weniger aufsteuern.Starting from its free end, the sliding sleeve 12 has longitudinal slots 24, which are distributed over the circumference and form spring tongues 25 between them, at the ends of which control surfaces 23 are arranged on the outer circumference, which interact with control openings 17, 18 in the control cylinder 13. Outwardly directed nozzle bores 19, 20 adjoin the control openings 17, 18. These are arranged offset to one another in the direction of movement 29 of the sliding sleeve 12. In the closed state of the slide valve 10, the control surfaces 23 cover the control openings 17, 18. A control surface 23 can cooperate with one or more control openings 17, 18. Due to the movement of the sliding sleeve 12 in one direction, the corresponding control opening 17 or 18 is first released and, when the sliding sleeve 12 is adjusted further, the control opening 17 or 18 which has remained closed until now. The sliding sleeve 12 can thus alternately or successively more control openings 17 or 18 more o - the less tax.
Im Bereich 26 der Steuerflächen 23 sind die Federzungen 25 verstärkt, so dass durch die erhöhte Formsteifigkeit die Steuerflächen 23 dicht an den Steueröffnungen 17, 18 anliegen und diese leckagefrei abschließen. Der Druck, mit dem die Steuerflächen 23 an den Steueröffnungen 17, 18 anliegen, kann durch eine bestimmte Vorspannung der Federzungen 25 erreicht werden oder durch den Druck des zu steuernden Mediums . Dieses wird durch einen Hohlraum 22 der Schiebehülse 12 zentral zugeführt und durch die Düsenbohrungen 19, 20 gefördert. Der Steuerzylinder 13 schließt stirnseitig mit dem Sackloch 21 ab. Zweckmäßigerweise werden die Federzungen 25 um einen vorgegebenen Betrag nach außen vorgebogen. Ferner kann die Federcharakteristik durch die Werkstoffauswahl und die geometrische Gestaltung bestimmt werden. Um die Schiebehülse gut montieren zu können, besitzt das Ventilgehäuse 11 zum Steuerzylinder 13 hin einen konischen Bereich 28, durch den die Federzungen 25 auf das Maß des SteuerZylinders 13 zurück gedrückt werden.In the area 26 of the control surfaces 23, the spring tongues 25 are reinforced, so that the control surfaces 23 bear tightly against the control openings 17, 18 due to the increased dimensional stability and seal them off without leakage. The pressure with which the control surfaces 23 bear against the control openings 17, 18 can be achieved by a specific pretensioning of the spring tongues 25 or by the pressure of the medium to be controlled. This is fed centrally through a cavity 22 of the sliding sleeve 12 and conveyed through the nozzle bores 19, 20. The control cylinder 13 closes at the end with the blind hole 21. The spring tongues 25 are expediently pre-bent outwards by a predetermined amount. Furthermore, the spring characteristic can be determined by the choice of material and the geometric design. Around the sliding sleeve well To be able to mount, the valve housing 11 has a conical area 28 towards the control cylinder 13, through which the spring tongues 25 are pressed back to the size of the control cylinder 13.
Die Ausführung nach Fig. 2, die im wesentlichen einen Ausschnitt der Fig. 1 in vergrößertem Maßstab darstellt, zeigt zwei Reihen von Düsenbohrungen 19, 20, die in Bewegungsrichtung 29 und/oder in Umfangsrichtung versetzt zueinander angeordnet sind. Die Düsenbohrungen 19, 20 können zur Bewegungsrichtung 29 eine unterschiedliche Neigung aufweisen und außerdem unterschiedliche Querschnittprofile besitzen, wie es an sich bei Kraftstoffeinspritzventilen der eingangs erwähnten Art bekannt ist. The embodiment according to FIG. 2, which essentially represents a section of FIG. 1 on an enlarged scale, shows two rows of nozzle bores 19, 20 which are arranged offset to one another in the direction of movement 29 and / or in the circumferential direction. The nozzle bores 19, 20 can have a different inclination to the direction of movement 29 and also have different cross-sectional profiles, as is known per se in fuel injection valves of the type mentioned at the outset.

Claims

Patentansprüche claims
1. Schieberventil mit einer in einem Steuerzylinder axial verschiebbaren Schiebehülse, die mit mindestens einer Steuerfläche an ihrem äußeren Umfang mindestens eine Steueröffnung in dem Steuerzylinder steuert, d a d u r c h g e k e n n z e i c h n e t , dass die Steuerfläche (23) zum Steuerzylinder (13) hin radial elastisch nachgiebig ist.1. Slide valve with an axially displaceable sliding sleeve which controls at least one control opening in the control cylinder with at least one control surface on its outer circumference, so that the control surface (23) is radially elastically flexible towards the control cylinder (13).
2. Schieberventil nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die Steuerfläche (23) unter einer Vorspannung am Steuerzylinder (13) anliegt.2. Slide valve according to claim 1, so that the control surface (23) bears against the control cylinder (13) under a pretension.
3. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die Steuerfläche (23) durch den Druck eines gesteuerten Mediums gegen den Steuerzylinder (13) gedrückt wird.3. Slider valve according to one of the preceding claims, that the control surface (23) is pressed against the control cylinder (13) by the pressure of a controlled medium.
4. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die Schiebehülse (12) im Bereich der Steuerfläche (23) mindestens einen Längsschlitz (24) aufweist.4. Slider valve according to one of the preceding claims, that the sliding sleeve (12) has at least one longitudinal slot (24) in the region of the control surface (23).
5. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass mehrere Längsschlitze (24) vorgesehen sind, die zwischen sich Federzungen (25) bilden, an denen die Steuerflächen (23) angeordnet sind. 5. Slide valve according to one of the preceding claims, characterized in that a plurality of longitudinal slots (24) are provided which form spring tongues (25) between them, on which the control surfaces (23) are arranged.
6. Schieberventil nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , dass die Federzungen (25) im Bereich (26) der Steuerflächen (23) verstärkt sind.6. Slider valve according to claim 5, so that the spring tongues (25) are reinforced in the region (26) of the control surfaces (23).
7. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass es in Cartridge-Bauweise ausgeführt ist.7. Slide valve according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that it is carried out in a cartridge design.
8. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die Schiebehülse (12) aus magnetisch leitendem Material hergestellt ist und ihr oberer Teil (27) gleichzeitig als Anker eines Magnetkreises dient.8. Slider valve according to one of the preceding claims, that the sliding sleeve (12) is made of magnetically conductive material and its upper part (27) serves simultaneously as an armature of a magnetic circuit.
9. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die Schiebehülse (12) verdrehsicher im Steuerzylinder (13) geführt ist.9. Slider valve according to one of the preceding claims, that the sliding sleeve (12) is guided in the control cylinder (13) so that it cannot rotate.
10. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass der Steuerzylinder (13) einen konischen Bereich (28) zum Einfädeln der Schiebehülse (12) aufweist .10. Slider valve according to one of the preceding claims, that the control cylinder (13) has a conical area (28) for threading the sliding sleeve (12).
11. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass es ein Kraftstoffeinspritzventil für eine Brennkraftmaschine ist.11. Slider valve according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that it is a fuel injection valve for an internal combustion engine.
12. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass im Steuerzylinder (13) mindestens zwei axial versetzte Steueröffnungen (17, 18) mit sich anschließenden Düsenbohrungen (19, 20) vorgesehen sind. 12. Slide valve according to one of the preceding claims, characterized in that in the control cylinder (13) at least two axially offset control openings (17, 18) with adjoining nozzle bores (19, 20) are provided.
3. Schieberventil nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass sich mindestens zwei Düsenbohrungen (19, 20) in Bezug auf ihre Lage und/oder Form unterscheiden. 3. Slide valve according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that at least two nozzle bores (19, 20) differ in terms of their position and / or shape.
PCT/EP2003/012936 2002-12-20 2003-11-19 Sliding valve WO2004059161A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2004562553A JP4232041B2 (en) 2002-12-20 2003-11-19 Sliding valve
EP03776910A EP1576281B1 (en) 2002-12-20 2003-11-19 Sliding valve
US10/540,290 US20060124763A1 (en) 2002-12-20 2003-11-19 Sliding valve
DE50303752T DE50303752D1 (en) 2002-12-20 2003-11-19 SLIDE VALVE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10261175.0 2002-12-20
DE10261175A DE10261175A1 (en) 2002-12-20 2002-12-20 spool valve

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JP (1) JP4232041B2 (en)
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CN105465412A (en) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 Pressure bar destabilizing trigger type reversing valve
CN105387245B (en) * 2015-12-16 2017-09-29 日照海卓液压有限公司 Six five logical logic selector valves
US10337448B2 (en) * 2015-12-22 2019-07-02 Ford Global Technologies, Llc Methods and systems for a fuel injector assembly
US10570865B2 (en) * 2016-11-08 2020-02-25 Ford Global Technologies, Llc Fuel injector with variable flow direction
CN114483383B (en) * 2022-01-28 2023-07-21 刘义亭 Gaseous fuel injector

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DE19908420A1 (en) * 1999-02-26 2000-05-25 Siemens Ag Blocking valve for controlling servo pressure for diesel engine fuel injection system

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JP2006510846A (en) 2006-03-30
EP1576281A1 (en) 2005-09-21
DE50303752D1 (en) 2006-07-20
EP1576281B1 (en) 2006-06-07
US20060124763A1 (en) 2006-06-15
DE10261175A1 (en) 2004-07-08
JP4232041B2 (en) 2009-03-04

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